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10.12.6 update problems when restarting imac

I updated my imac with sierra 10.12.6, when it restarts its gets stuck on the black apple loading screen when bar is full, any advice?

Possible Fixes for El Capitan or Later

You should try each, one at a time, then test to see if the problem is fixed before going on to the next.

 

    Be sure to backup your files before proceeding if possible.

 

  1. Resetting your Mac’s PRAM and NVRAM
  2. Reset the System Management Controller (SMC)
  3. Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
  4. Repair the disk by booting the from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volume entry from the side list.  Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and return to the Utility Menu. Restart the computer from the Apple Menu.
  5. Create a New User Account Open Users & Groups preferences. Click on the lock icon and enter your Admin password when prompted. On the left under Current User click on the Add [+] button below Login Options. Setup a new Admin user account. Upon completion log out of your current account then log into the new account. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another.
  6. Install Combo Updater Download OS X El Capitan 10.11.6 Combo Update or Download macOS Sierra 10.12.5 Combo Update and install.
  7. Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.
  8. Erase and Install OS X Restart the computer. Immediately after the chime hold down the Command and R keys until the Apple logo appears. When the Utility Menu appears:
  1. Select Disk Utility from the Utility Menu and click on Continue button.
  2. When Disk Utility loads select the drive (out-dented entry) from the Device list.
  3. Click on the Erase icon in Disk Utility's toolbar. A panel will drop down.
  4. Set the Format type to Mac OS Extended (Journaled.)
  5. Click on the Apply button, then wait for the Done button to activate and click on it.
  6. Quit Disk Utility and return to the Utility Menu.
  7. Select Reinstall OS X and click on the Continue button.

I have experienced the same problem, with an MacBook Pro Retina 15", end of 2013. Blocked after restarting, again and again. I asked Apple support, and after several attempts (including the reinstallation of macOS) the only and final solution was to recover from Time Machine. Scaring, as it implies erasing the disk, as the first step. It has been successful, my mac is working again, but keeps asking for the installation of the upgrade. Again. Which I'll certainly not allow, for the time being. I've been trying to identify whether anyone else experienced this problem, as there's no "noise" on Internet, which surprised me. I would really appreciate having an "official" explanation for this problem, as I suspecte there's something wrong with this update.

I ended up doing what you did and also have my machine running again.

Same problem here - MacBook Air Early 2014. Current version 10.12.5 - tried different ways:

- Update via AppStore --> after install the boot screen stucks (process indicator full)

- Update via separate downloaded update --> after install the boot screen stucks (process indicator full)

- Clean install of 10.12.6 sierra --> worked

                                                  --> recovery of time machine backup --> after install the boot screen stucks

- PRAM restored, clean install --> same behavior after time machine recovery... no way to get the MBair running with my programs installed and 10.12.6

 

I assume it something with the data from the TM backup.... but I don't see a way to see the reason for that

Has any one come across any comments from Apple support?

At the moment I wasn't in contact with Apple. I'll stay at 10.12.5 and wait for HighSierra

When is High Sierra expected to be released Stephen?

I think in autumn

Same here: stuck in boot-loop after 10.12.6 update on MBPro from 2013. Looks like a re-install (of 10.13.5 and wait for high Sierra)

 

:(

This, again, seems to be a .kext Problem, meaning certain Kernel Extensions are not compatible anymore. Mine were Canon Printer .kext Files.

Procedure: Command R after it chimes at start-up.

Start Terminal.

Navigate to Volumes/Macintosh HD/Library/Extensions.

 

When I delete the BJUSB and CIJUSB kext Files, everything works perfect. Seems that the Canon v3.4 Update causes this (released at the same time: by Apple!). I find it very annoying, that printer drivers can mess up the system in that way. Happened to me before. Spent at least 4 days trying to fix this.

Intriguing! How could be identified which .kext are to be blamed? Is it there any trace of that?

 

I checked my Library/Extensions directory, and I've many I know neither its purpose nor the consequences of eliminating them.

Fear and loathing of updates, so this iMac beauty is still at 10.12.4.

I will join stephan and wait...unless I need to install 10.12.5 now.

 

While waiting, must I install 10.12.5 now?

Anyone?

Help.

 

Thanks.

Always the same... But it helps not ;-)

 

GionDschember has right! It was a Kext Problem...

Thanks! :-) Worked for me!

最后更新：2017-08-19 03:06:09

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